3.2.2. Response: Distance

Name:

Distance

Bit

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

Q3

Q2

Q1

Q0

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

Description

Don't care

DIST [11:0]

DIST:

Distance value

Data format: unsigned 12 bit integer; Unit: LSB

For 10MHz LED modulation frequency the following values and formulas apply:

1 LSB = 0.5 cm. Minimum DIST = 0d

≙ 0m. Maximum DIST = 3'000d ≙ 15m.

The basic calculation formula is

D [cm]

= DIST⋅

1'500 cm

3'000LSB

D

Distance in centimeters

Offset compensation, needs to be evaluated by a calibration of the sensor. Refer also to

chapter Calibration and compensations.

Note:

The epc600 chip is using a sensor array with 64 pixels. The distance value output is an average calculation. Refer also to

the epc600 Handbook for more details.

3.2.3. Response: Valid & saturated pixels

Name:

Valid & saturated pixels

Bit

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

Q0

D6

D5

D4

D3

D2

D1

D0

Q0

D6

D5

D4

D3

D2

D1

D0

Description

0

MAX_SAT_PIX [6:0]

0

MIN_VALID_PIX [6:0]

MIN_VALID_

PIX:

During the measurement, one of the 4 samples has used only this number of valid pixels per sample for the averaging. The

remaining pixels were detected as non-valid. A pixel is valid if the measurement value is: not in the pixel saturation and be -

low the input electronics saturation. Refer to chapter 1.3.4.: Quality of the measurement result.

Data format: unsigned 7 bit integer; Output range: 0d ... 64d.

Note: Distance values are valid as long as MIN_VALID_PIX >0 (minimum condition).

MAX_SAT_

PIX :

During the measurement, one of the 4 samples has skipped / not used this number of saturated pixels during averaging. A

pixel is marked as saturated if the sensor has detected a pixel signal value that exceeds the linear range of the pixel. Refer

to chapter 1.3.4.: Quality of the measurement result.

Data format: unsigned 7 bit integer; Output range: 0d … 64d

3.2.4. Response: Q-subsample QSx

Name:

Q-subsample QSx

Bit

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

Q1

Q0

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

Description

0

0

QSx [13:0]

QSx:

Q-subsample x of the last measurement.

Data format: signed 14 bit integer (two's complement); Unit: LSB

For the calculation of the signal quality refer to chapter 1.3.4.: Quality of the measurement result.

© 2014 ESPROS Photonics Corporation

Characteristics subject to change without notice

24 / 30

Datasheet epc600 - V1.3

www.espros.ch